I am also having major issues with 2 rts2’s. The first one was difficult to zero and once I got it dialed in I began to run drills. All of the sudden I’m 1&1/2 feet low. I got it back up to 8 inches low and that’s the best it would get. So I had a second rts2 overnighted so I could make the weekend match. It zeroed fine but when I started running it hard it also dropped to a foot low and would not adjust back up. I have followed all the instructions from the manual and it rides on a cz slide. They are both going to go to the repair shop Monday.
p.s. They were zeroed at 25 yards.